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Line search accepts decrease without sufficient decrease · case 03
Line search accepts decrease without sufficient decrease.
Case contract
For positive alpha and 0<c<1, accept exactly when slope<0 and trial<=old+c*alpha*slope.
Why this case matters
This deterministic solver-step model isolates an algorithmic invariant used by iterative optimization implementations.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| weak decrease | true | false | Failed |
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